Process of inclosing food products.



C. W. GRAHAM.

PROCESS OF INCLOSING FOOD PRODUCTS.

APPLICATION FILED AUG-Z2. 19H- LW0,0%% Patented Oct. 26, 1915.

Gfzmias Wain/Wm 1 an Whi t e rattan 'r' is 111* CHARLES W. GRAHAM, 0F NEW YORIL N. 55., ASSIGNOR T0 AMERICAN CAN COMPANY,

' OF NEW YORK, N. 52., AfiQRPORATION OF NEW JERSEY.

PROCESS OF INCLOSING F001) PRODUCT$ arsenic.

To all whom it may concern Be it known that 1, CHARLES W. GRAHAM, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented a new and useful Improvement in Processes of Inclosing Food Products, of which the following is a specification.

This invention relates to a process of hermetically inclosing certain food products in sheet metalvessels. And it consists in packing sardines in oil,-or-any other food product containing a "liquid admixture such as olive oil or cotton seed oil, that may serve as a suitable flux for a soldered seam,in a

sheet metal vessel or can, to which a sheet metal cover is applied and temporarily united by interfolding with the sheet metal body, and thereafter dipping or immersing the inverted scam in a solder bath so that the oilyflux of the contents and the molten solder may approach each other and form a hermetic seam free from pin holes.

In the accompanying drawing which forms a part of this specification, Figure 1 is a sectional view of a suitably flanged sheet metal can or vessel for practising my invention, said vessel being filled with sardines and oil. Fig. 2 is a similar section of the same can and its contents, with a suitably flanged cover loosely applied thereto. Fig. 3 is a similar section, showing the flange of the cover interfolded with the flange of the can body, temporarily uniting the two, ready for the soldering operation. Fig. 4 is a simlar sectional view showing the can body and its cover inverted to bring the seam to the lower position and immersed in a bath of moltensolder.

Owing to the tendency. of the contents of filled sardine cans to expand, vaporize or gasify under the action of the heat'of soldering irons applied to the seam, the hermetic closure of such filled cans by soldered seams has always been a diflicult thingto do without special machinery operating to solder the joint, and many diflerent devices have been contrived to accomplish this purpose. In the present invention, I obviate all of these difficulties by taking advantage of the fact that the contents of the can themselves, or thepliquid portion of said contents is a most excellent solder flux, and of the further fact, that the molten solder is far denser than the oily contents of the can, and at Specification of Letters Patent.

Patented wet. as, rain.

Application filed. August 22, 1911. Serial No. 645,461.

folded seam of the inverted can in molten solder, leaving said seam immersed only long enough to insure the sweating of the solder into the crevice of the seam far enough to establish a sound joint, after which the can is taken out, cooled, and the process completed. It is a fact that the presence ofthe fluxin the crevice of the seam to be soldered will tend-to draw the solder into said crevice and thus perfect the joint, and advantage is taken of that fact in this process.

In said drawing, A is the can body and a a suitably formed flange on the upper rim of the said body.

B is the cover and b a suitably formed D is the bath of molten solder into which the seam of the inverted can body is immersed.

During the solderin operation the body of the can is subjecte to a current of air, as shown in Fig. 4. This is conveniently done by providing a large vertical air pipe E within the solder bath, and havin an open upper end over which the under si e of the can is applied when its flange is immersed in the bath. Into the pipe E and against the under side of the can a current of air is caused to pass by means of and through a central air pipe F, as indicated by the arrows in Fig. 4:, the air escaping down the pipe E.

l". claim 1-- 1. The process of canning food products $3 1,1eepee and at the same time subjecting the body of the can to a current of am 2.- The process of canning food products which consists. in inclosing the food. product within a can, together with a soldering flux,

and, then immersing the seam of the can in I a bath of molten solder and drawing the solder from said bath into the seam of the can by the aid of said; flux within the seam,

and at the same time applying a cooling 19 medium to the body of the can.

CHARLES W. GRAHAM.

Witnesses PEARL ABRAMS, H. M. MUNDAY. 

